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2003-04-29  Ulrich Drepper  <drepper@redhat.com>

	* sysdeps/i386/fpu/Makefile: New file.
	* sysdeps/i386/fpu/fedisblxcpt.c: Also set SSE control word.
	* sysdeps/i386/fpu/feenablxcpt.c: Likewise.
	* sysdeps/i386/fpu/feholdexcpt.c: Likewise.
	* sysdeps/i386/fpu/fesetround.c: Also set SSE rounding mode
	[PR libc/4987].
This commit is contained in:
Ulrich Drepper 2003-04-29 07:18:57 +00:00
parent b65b090086
commit e40468fa25
6 changed files with 81 additions and 5 deletions
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9
ChangeLog
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@ -1,3 +1,12 @@
2003-04-29 Ulrich Drepper <drepper@redhat.com>
* sysdeps/i386/fpu/Makefile: New file.
* sysdeps/i386/fpu/fedisblxcpt.c: Also set SSE control word.
* sysdeps/i386/fpu/feenablxcpt.c: Likewise.
* sysdeps/i386/fpu/feholdexcpt.c: Likewise.
* sysdeps/i386/fpu/fesetround.c: Also set SSE rounding mode
[PR libc/4987].
2003-04-28 Ulrich Drepper <drepper@redhat.com>
* nscd/nscd_getgr_r.c: Compact code a bit. Add some __builtin_expect.

3
sysdeps/i386/fpu/Makefile Normal file
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@ -0,0 +1,3 @@
ifeq ($(subdir),math)
$(objpfx)libm.so: $(elfobjdir)/ld.so
endif

18
sysdeps/i386/fpu/fedisblxcpt.c
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@ -1,5 +1,5 @@
/* Disable floating-point exceptions.
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 1999.
@ -19,6 +19,9 @@
02111-1307 USA. */
#include <fenv.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
int
fedisableexcept (int excepts)
@ -35,5 +38,18 @@ fedisableexcept (int excepts)
new_exc |= excepts;
__asm__ ("fldcw %0" : : "m" (*&new_exc));
/* If the CPU supports SSE we set the MXCSR as well. */
if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0)
{
unsigned int xnew_exc;
/* Get the current control word. */
__asm__ ("stmxcsr %0" : "=m" (*&xnew_exc));
xnew_exc |= excepts;
__asm__ ("ldmxcsr %0" : : "m" (*&xnew_exc));
}
return old_exc;
}

21
sysdeps/i386/fpu/feenablxcpt.c
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@ -1,5 +1,5 @@
/* Enable floating-point exceptions.
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 1999.
@ -19,11 +19,15 @@
02111-1307 USA. */
#include <fenv.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
int
feenableexcept (int excepts)
{
unsigned short int new_exc, old_exc;
unsigned short int new_exc;
unsigned short int old_exc;
/* Get the current control word. */
__asm__ ("fstcw %0" : "=m" (*&new_exc));
@ -34,5 +38,18 @@ feenableexcept (int excepts)
new_exc &= ~excepts;
__asm__ ("fldcw %0" : : "m" (*&new_exc));
/* If the CPU supports SSE we set the MXCSR as well. */
if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0)
{
unsigned int xnew_exc;
/* Get the current control word. */
__asm__ ("ldmxcsr %0" : "=m" (*&xnew_exc));
xnew_exc &= ~excepts;
__asm__ ("stmxcsr %0" : : "m" (*&xnew_exc));
}
return old_exc;
}

19
sysdeps/i386/fpu/feholdexcpt.c
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@ -1,5 +1,5 @@
/* Store current floating-point environment and clear exceptions.
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
Copyright (C) 1997, 1999, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@ -19,6 +19,9 @@
02111-1307 USA. */
#include <fenv.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
int
feholdexcept (fenv_t *envp)
@ -32,5 +35,19 @@ feholdexcept (fenv_t *envp)
work = envp->__control_word | 0x3f;
__asm__ ("fldcw %0" : : "m" (*&work));
/* If the CPU supports SSE we set the MXCSR as well. */
if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0)
{
unsigned int xwork;
/* Get the current control word. */
__asm__ ("stmxcsr %0" : "=m" (*&xwork));
/* Set all exceptions to non-stop. */
work |= 0x1f80;
__asm__ ("ldmxcsr %0" : : "m" (*&xwork));
}
return 0;
}

16
sysdeps/i386/fpu/fesetround.c
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@ -1,5 +1,5 @@
/* Set current rounding direction.
Copyright (C) 1997 Free Software Foundation, Inc.
Copyright (C) 1997, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
@ -19,6 +19,9 @@
02111-1307 USA. */
#include <fenv.h>
#include <unistd.h>
#include <ldsodefs.h>
#include <dl-procinfo.h>
int
fesetround (int round)
@ -34,5 +37,16 @@ fesetround (int round)
cw |= round;
__asm__ ("fldcw %0" : : "m" (*&cw));
/* If the CPU supports SSE we set the MXCSR as well. */
if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0)
{
unsigned int xcw;
__asm__ ("stmxcsr %0" : "=m" (*&xcw));
cw &= ~0x6000;
cw |= round << 3;
__asm__ ("ldmxcsr %0" : : "m" (*&xcw));
}
return 0;
}